Printing-machine.



No.848,065. PATENTED MAR.26,1907.

PRINTING MACHINE.

APPLICATION TILED 00112. 1900.

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No. 848,065, PATENTED MAR. 26, 1907.

H. STAMM.

I PRINTING MACHINE.

APPLICATION FILED 00112. 1906.

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HENRY STAMM, OF RENTZSCHMUHLE, NEAR J OOKETA, GERMANY, ASSIGNOR TO SCHNELLPRESSENFABRIK ACTIEN -GESELLSCHAFT, OF HEIDEL- BERG, GERMANY.

PRINTING-MACHINE.

Patented March 26, 1907.

Application filed October 12,1906- Serial No. 338,664.

To all, who/1t zit 'II'I/II/LI/ concern:

Be it known that I, HENRY STAMM, engineer, a citizen of the Swiss Republic, residing at Rentzschmuhle, by J ocketa, Saxony, Germany, have invented certain new and useful Improvements in Printing Machines, of which the following is a specification.

This invention relates to a machine for continnously printing paper on both sides from a flat form.

Figure 1 is a diagrammatic vertical section of the machine, and Figs. 2, 3, and 4 are diagrams showing the parts in different positions. Fig. 5 shows the feed and cutting mechanism to a larger scale.

The table M carries two forms F and F for printing and perfecting and is reciprocated by a crank K or any other ordinary mechanism. There are three impression-cylinders.namely, two smaller ones, D and D, with a circumference of about one maximum sheet length, D, working on the form F, and the other, D, working on the form F, while the larger cylinder D works on both forms. These three impression-cylinders are geared together and rotate continuously. The large cylinder D has a circumference equal to four maximum sheet lengths. The cylinder D is in contact with the forms when the latter are moving in one direction, and the two smaller ones, D D, are in contact with them during their return. The large cylinder D rotates in fixed bearings, and the forms on their return pass it Without touching, one-half of the cylinder being cut away, while the two small cylinders D D are slightly lifted when the forms are moving from left to right, so that they do not touch them.

Figs. 1, 2, 3, and 4 show the positions of the forms and printingcylinders in four different phases.

The machine may be fed either by hand or from the reel R. The paper coming from the latter is, if variable sizes are to be printed, led between a pair of rollers Z and then cut in sheets by a pair of cutting-rollers S and carried by short tapes B to the nip of the cylinders D D. The sheet 1 is there seized (in the position Fig. 1) by the grippers of the small cylinder D and is printed during the movement of the form F, as indicated by the arrow, Figs. 1 and 2. The sheet 1 thus printsurface d of the cylinder D and is seized by grippers, and the perfecting printing commences at the end position of the forms, as shown in Fig. 3, while the succeeding sheet 2 is shortly afterward seized by the grippers of the second printing-surface d of the large cylinder D. The printing of sheet 2 commences on form F, as shown in Fig. 4, at the center position of the forms. Fig. 1 shows how sheet N o. 1, having been printed on both sides, enters the tapes A, which lead it away to a pile or into a folding apparatus, as the case may be. Sheet 2, which has been printed on one side during the passage from position in Fig. 4 into the position Fig. 1, is then seized by the grippers on the small cylinder D and comes into the position shown in Fig. 2. Then during the return movement of the forms sheet 2 receives the perfecting print on form F, as shown in Fig. 2. It leaves the cylinder D to pass onto the tapes A, similarly to the first sheet. Therefore in each revolution of the large cylinder D, or one revolution of the crank K, or one complete reciprocation of the forms two sheets are printed on both sides. In consequence of the short travel of the forms the inking involves some difficulty. For this purpose three groups of form-rollers a b c, Fig. 1, are provided.

The two outer groups a and 0 do not differ from those usually used in cylinder printingpresses and would suffice for ordinary newspaper work, group (L inking the form F and group 0 the form F. These two roller groups, however, would only ink the forms once for each two impressions. With the assistance of the third group I) both forms are inked once for each impression. This center group of form-rollers is placed inside the large impression-cylinder D. During the print-.

ing period of this cylinder, Fig. 4, these rollers are lifted and run on the inner surface of the same, which serves as a distributingtable. In the position Fig. 1 the form,- roller b (or two form-rollers might be used instead of one) is lowered and commences to ink the forms one after the other, as is shown in the two next positions, Figs. 2 and 3. In the latter position the printing by the large cylinder again commences, and the formroller 1) again runs on the inner surface. This ed on one side is then carried to the printinginner surface receives the ink from a swinging roller L from the duct K outside the cylinder, but which might be fixed inside it, or

the cylinder itself might serve as the ink-receiving roller and a duct be fixed to it.

The ink may be fed to the outer form-rollers a and c by tables t 25, Fig. 1, or by separate ducts fixed 011 the right and left, respectively.

The grippers may be replaced by other 1 iomeans, such as tapes, points, air suction, or

the like.

Smaller sheets than the maximum size, which is equal to the circumference oi the small printing-cylinders DVD, can be print ed both from endless webs and rein sheets Without changing the cylinders or other mechanism, except if}? iced cause all three cylinders al "ays rot "o in 5 same direction, and ti heads of ti sheets consequently always come to the sa is i l1 t1 e two small iinpr3ssion-cylin lcrs l) l) are removed, the mac iine may be uscd as an ordinary sl' ole-size sheets, which can be presented at dead-points to grippers of t e large or inder D, which always stops tor a mo the dead-points, or they may be fed from the reel.

lt is not absolutely neccssary to r the impression-cylinder to be in the proportion of (our to one of the smaller ones. proportions may be chosen; but he register of print and perfecting print could not be obtained. with ordinary gearing, and it would be necessary to obtain increased and decreased speeds by means oi oval cog-wheels or other mechanism hat I claim is-- l. The combination oi a pair of reciprocating forms, a continuouslyacvolving segmental impression-cylinder provided with a pair of impression-stirfaces coanng successively into contact with the forms when the ar set-printing mac ine for dou- 5 ntat with one of the l'orms when it is moving in the reverse d ircction.

2. The combination of a pair of reciprocating forms, a contiimously-rcvolving scgmen ta l impression-cylimler provided with a pair of iinpressioil-surfaces coming succcssivelr into contact with the l'orms when they are moving in one but not in, the reverse direction and a pair of continumisly-revolving impression-cylimlers each of one-lourtli. the diameter oi the first cylinder and each coming into contact with one of the iorms when it is moving in the reverse direction.

'7'he combination of a pair 01' reciprocating forms, a continuousl v'rcvolving scgmcn-- tal inrprcssion-cylinder provided with a pair or inipression-suriaccs coming successively into contact with the terms when they are l moving in one but not in. the reverse dircction, a pair oi continuously-rcvolving iml pression-cylimlcrs cacii coming into contact with one oi the lorms when it is moving in their crsc direction, means i'orsumilving ink to the inner surlacc ol' the said segment at cyll indcr, a distrilailing-roller spreading the ink on this sur'l'ace and means ior transl'crring the ink from the said surlacc to the lorn s 4. The combination or" a pair oi reciprocating forms, a continuouslv-revolving segmental impression-cvlindor provided with a pair or iinprcssion-surlaccs coining succcssivclv into contact with the terms \rlirn the are moving in one but not in the reverse direction, a pair of continuously-revolving impressioinc ylimlers each oi onc-lourtli the dilirst cvlinder and each coining HENRY S'IAMM.

.Yitncsses:

Gnone Rieirrnn, Ron'mrr B. Rimsronn. 

